Method of inhibiting alveolar bone resorption and periodontal membrane loss and composition for internal use to be used therein

ABSTRACT

Alveolar bone resorption, periodontal membrane loss, and gingival recession can be inhibited by administering 500 mg to 2000 mg per day of calcium, 10 mg to 40 mg per day of soy isoflavone aglycone, and vitamin D 3  to persons having a tendency for decreased bone density, postmenopausal women, and periodontal disease patients in a maintenance phase; and even an extended period of administration provides a high degree of safety.

TECHNICAL FIELD

The present invention relates to a method for inhibiting alveolar bone resorption and periodontal membrane loss of persons having a tendency for decreased bone density, postmenopausal women, and periodontal disease patients in a maintenance phase; a method for inhibiting gingival recession of such persons; and an oral composition, an agent for preventing or treating gingival recession, and an agent for preventing or treating alveolar bone resorption and periodontal membrane loss, each comprising a soy isoflavone aglycone, calcium, and vitamin D₃.

BACKGROUND ART

Decreased bone density is caused by aging, nutrition/diet problems such as shortage of calcium intake, lack of exercise, medicines such as adrenal corticosteroids, etc. In particular, women tend to suffer a rapid decrease of bone mass because of decreased estrogen secretion due to menopause. Here, a person having decreased bone density is one whose bone mineral density is 1 SD (Standard Deviation) or more below the young adult mean (>−1 SD), according to the criteria proposed by the WHO research group in 1994; or one whose bone density is 80% or less of the young adult mean (YAM), according to the criteria proposed by the Japanese Society for Bone and Mineral Research in 1996.

Periodontal disease is an infection caused by specific periodontal disease-causing bacteria. Examples of such periodontal disease-causing bacteria include gram-negative anaerobic bacteria such as Porphyromonas gingivalis. Periodontal disease-causing bacteria increase in the plaque that forms around the root of a tooth cervix, inducing chronic inflammation of the surrounding tissues including gingiva, periodontal membrane, and alveolar bone, and thus developing symptoms of periodontal disease. Because of chronic inflammation induced by periodontal disease-causing bacteria, periodontal disease advances resorption of alveolar bone, which supports the teeth, and it is the greatest cause of lost teeth in developed countries.

With respect to postmenopausal women, it has been revealed that there is a correlation between the drop in bone density and the progression of periodontal disease (Yasunari Kurosu et al., Nihon Shika Hozongaku Zassi (The Japanese Journal of Conservative Dentistry), 1998), and decreased bone mass is regarded as a risk factor for periodontal disease.

The finding that a drop in bone density relates to the progression of periodontal disease led to an animal experiment using bisphosphonate, which is a bone resorption inhibitor. It was thus reported that bisphosphonate is useful for inhibiting alveolar bone resorption in experimental periodontitis (Reddy et al., J Periodontol, 66 (3), 211-217, 1995). However, since bisphosphonate has strong side effects, it is not suitable for periodontal disease treatment, which requires long-term medication. Therefore, the development of a pharmaceutical preparation having a high degree of safety has been desired.

Since periodontal tissues do not recover completely even after periodontal disease treatment, the dental root surface of a treated area is exposed. Because inflamed parts and affected tissues are physically removed in the process of treatment, the treated area tends to suffer gingival recession. Accordingly, in a maintenance phase, when the symptoms are stable after periodontal disease treatment, gingival recession and a relapse of periodontal disease are highly likely to occur. Therefore, the development of a pharmaceutical preparation that has a high degree of safety and that is useful for inhibiting gingival recession and maintaining periodontal tissues such as alveolar bone and periodontal membrane is desired.

It is well known that calcium is a necessary nutritional component for growing children, pregnant women, etc. to maintain or enhance the bone calcium density of alveolar bone (“X-ray, optical microscopic, and scanning electron microscopic research on alveolar bone changes due to vitamin D deficiency”, The Journal of the Kyushu Dental Society, 46, 67-88, 1992). Accordingly, there are a large number of calcium food supplements available. It is known that specific calcium salts (such as calcium pantothenate) inhibit alveolar bone resorption, which is related to periodontal disease (Japanese Unexamined Patent Publication No. 1996-133969). It is thus accepted that intake of calcium and calcium salts is effective to some extent in the prevention of periodontal disease.

In contrast, it is known that soy isoflavones abundantly contain components having antibacterial properties and natural bone metabolism improvement actions. Therefore, say isoflavones have been used together with calcium salts and vitamin D in oral nutritional supplements for osteoporosis prevention and whole-body bone strengthening, and, in the United States of America, they have been sold under the trade names of “Osteo Soy” (FreeLife, U.S.A.) and “Soylife” (Schouten, U.S.A.). Like ordinary calcium supplements, these are in oral tablet, capsule, and powder forms and are not intended for the prevention of periodontal disease. Among soy isoflavones, genistein shows antibacterial activity against periodontal disease-causing bacteria; therefore, it has been used as an antiperiodontitis agent (Japanese Unexamined Patent Publication No. 1992-283518) and has been used together with high-solubility calcium in a food composition for the prevention of periodontal disease or the prevention of periodontal disease progression (Japanese Unexamined Patent Publication No. 1999-243910). However, the above periodontal disease prevention is based on the antibacterial properties of soy isoflavones, and there has been no reported case of inhibited periodontal membrane loss.

DISCLOSURE OF THE INVENTION

An object of the present invention is to provide a method, oral composition, and prevention or treatment agent for inhibiting alveolar bone resorption and periodontal membrane loss or inhibiting gingival recession in persons having a tendency for decreased bone density and postmenopausal women, while having a high degree of safety even when the composition or agent is taken for extended periods of time.

The present inventors conducted extensive research and, as a result, found that alveolar bone resorption, periodontal membrane loss, and gingival recession can be inhibited by the combined use of a soy isoflavone aglycone, calcium, and vitamin D₃. Based on this finding, the inventors have accomplished the present invention.

Specifically, the present invention provides the following oral compositions, prevention or treatment agents, and methods.

1. An oral composition for alveolar bone resorption inhibition and periodontal membrane loss inhibition, comprising a soy isoflavone aglycone, calcium, and vitamin D₃.

2. An agent for preventing or treating gingival recession, comprising a soy isoflavone aglycone, calcium, and vitamin D₃.

3. An agent for preventing or treating alveolar bone resorption and periodontal membrane loss, comprising a soy isoflavone aglycone, calcium, and vitamin D₃.

4. A composition or agent according to any one of items 1 to 3, wherein the proportion of soy isoflavone aglycone in the composition or agent is 0.001% to 10% by weight; and the proportion of calcium in the composition or agent is 0.01% to 50% by weight.

5. A composition or agent according to any one of items 1 to 3, wherein the composition or agent is for persons having decreased bone density, postmenopausal women, or periodontal disease patients in a maintenance phase.

6. A composition according to item 1, wherein the soy isoflavone aglycone is an extract from whole-grain soy; the genistein/daidzein weight ratio in the soy isoflavone aglycone is in the range of 1/1 to 1.5/1; and the proportion of the total weight of genistein and daidzein in the soy isoflavone aglycone is at least 90%.

7. A method for inhibiting alveolar bone resorption and periodontal membrane loss, comprising orally administering a composition according to any one of items 1 to 6.

8. A method for preventing or treating gingival recession, comprising orally administering a soy isoflavone aglycone, calcium, and vitamin D₃.

9. A method for preventing or treating alveolar bone resorption and periodontal membrane loss, comprising orally administering a soy isoflavone aglycone, calcium, and vitamin D₃.

10. A method according to item 8 or 9, wherein the soy isoflavone aglycone, calcium, and vitamin D₃ are administered to persons having decreased bone density, postmenopausal women, or periodontal disease patients in a maintenance phase.

11. A method according to item 9 or 10, wherein the soy isoflavone aglycone is administered in an amount of 10 mg to 40 mg per day; and calcium is administered in an amount of 500 mg to 2000 mg per day.

In the present specification, gingival recession includes a gingival margin receding down from the boundary between the tooth cementum and enamel, i.e., the cement/enamel junction, toward the root apex, thereby exposing a dental root. Gingival recession can be quantified by, for example, the numerical value obtained by subtracting the periodontal pocket depth (PD) from the clinical attachment level (CAL) (see FIG. 1). In the present specification, periodontal disease patients in a maintenance phase encompass those who, having finished periodontal disease treatment, are in a clinically recovered and stable condition but need observation.

Soy isoflavone aglycones in the present invention are soy isoflavone nonglycosides such as genistein, daidzein, glycitein, etc., and can be usually obtained as soy isoflavone glycoside hydrolysates. Such soy isoflavone aglycones can be obtained by, for example, extracting a glycoside from seeds (whole-grain soybeans) of Glycine max Merrill (Leguminosae family) according to such a known method as disclosed in Japanese Unexamined Patent Publication No. 1987-126186, and subjecting the obtained glycoside to acid heating or β-glucuronidase enzyme hydrolysis in a purification step.

There are no limitations on the methods for obtaining soybean extracts from whole-grain soybeans or isoflavone glycosides from ground soybeans, and obtaining aglycones from the glycosides. If soybean hypocotyls are used instead of whole-grain soybeans, isoflavones can be efficiently obtained; however, the content of glycosides such as daidzin, glycitin, etc., is high, and such glycosides are not easily converted into nonglycosides such as genistein, daidzein, etc. by hydrolysis. Therefore, whole-grain soybeans are more advantageous than soybean hypocotyls as starting materials for soy isoflavone aglycones such as genistein, daidzein, etc.

The soy isoflavone aglycone used in the present invention is preferably at least one aglycone selected from the group consisting of genistein and daidzein. It is preferable to use genistein and daidzein in combination such that the genistein/daidzein weight ratio is in the range of 1/1 to 1.5/1. In the soy isoflavone aglycone, the content of genistein is preferably greater than that of daidzein. It is also preferable that the proportion of the total weight of genistein and daidzein in the soy isoflavone aglycone is at least 90% by weight. Soy isoflavone aglycones may be powdered with excipients added thereto to be in forms suitable for various oral preparations or may be used in forms suitable for beverages, such as preparations with emulsifiers and solubilizers added thereto, cyclodextrin inclusion preparations, etc.

The proportion of soy isoflavone aglycone in the composition or the prevention/treatment agent of the present invention is not limited as long as it allows the objects of the invention to be achieved. The proportion of soy isoflavone aglycone in the composition or the prevention/treatment agent of the invention is usually 0.001% to 10% by weight, and preferably 0.005% to 5.0% by weight. In the method for inhibition of alveolar bone resorption and periodontal membrane loss and the method for prevention or treatment thereof according to the present invention, soy isoflavone aglycone is usually administered to an adult in an amount of 10 mg to 40 mg per day, and preferably in an amount of 10 mg to 20 mg per day; and the administration of soy isoflavone aglycone may be carried out in one dose a day or in two or more divided doses a day.

Any natural or synthetic calcium may be used in the present invention. Examples of natural forms of calcium include those derived from oyster shells, egg shells, corals, cattle bones, milk, etc.; and these items themselves and crude products of these such as ground products, dried products, etc, can be used as calcium sources. Examples of synthetic forms of calcium include calcium gluconate, calcium lactate, calcium chloride, calcium glycerophosphate, calcium pantothenate, calcium tertiary phosphate, calcium carbonate, calcium citrate, etc. Such forms of calcium may be used singly or in combination of two or more.

The proportion of calcium in the composition or the prevention/treatment agent of the present invention is not limited as long as it allows the objects of the invention to be achieved. The proportion of calcium in the composition or the prevention/treatment agent of the invention is usually 0.01% to 50% by weight, and preferably 0.1% to 20% by weight, calculated as the Ca content. In the method for inhibition of alveolar bone resorption and periodontal membrane loss and the method for prevention or treatment thereof according to the present invention, calcium is usually administered to an adult in an amount of 500 mg to 2000 mg per day, and preferably in an amount of 500 mg to 1000 mg per day; and the administration of calcium may be carried out in one dose a day or in two or more divided doses a day.

Vitamin D₃, which is used in the present invention, is also called cholecalciferol. When used in the composition or the prevention/treatment agent of the invention, vitamin D₃ may be in crystalline form or may be in the form of a preparation for stabilization. The proportion of vitamin D₃ in the composition or the prevention/treatment agent of the present invention is not limited as long as it allows the objects of the invention to be achieved. The proportion of vitamin D₃ in the composition or the prevention/treatment agent of the invention is usually 10⁻⁸% to 10⁻¹% by weight, and preferably 10⁻⁷% to 10⁻²% by weight. In the method for inhibition of alveolar bone resorption and periodontal membrane loss and the method for prevention or treatment thereof according to the present invention, vitamin D₃ is usually administered to an adult in an amount of 200 IU to 800 IU per day, and preferably in an amount of 200 IU to 400 IU per day; and the administration of vitamin D₃ can be carried out in one dose a day or in two or more divided doses a day.

The composition of the present invention is an oral composition for alveolar bone resorption inhibition and periodontal membrane loss inhibition. Examples of oral compositions include food compositions, pharmaceutical compositions, etc.; and preferable examples thereof are food compositions. The forms of oral compositions of the present invention encompass those used in the fields of foods and pharmaceuticals; however, preferable forms are those which allow the composition to stay in the oral cavity for a long time, such as troches, chewing gums, chewable tablets, gummy candies, candies, etc. Among such forms, troches and chewable tablets are especially preferable. Tablets such as troches and chewable tablets are preferably produced by the following method.

A powder mixture (powder particle diameter: no more than 250 μm) of soy isoflavone aglycone with other components such as calcium, sugar alcohol, and excipient are wetted by alcohol, water, and optionally a disaccharide-or-higher polymerized reducing sugar such as polydextrose, reduction dextrin, maltitol, maltotriitol, etc. or a combination of such disaccharide-or-higher polymerized reducing sugars, and granulated. The resulting granules are mixed with flavor, vitamin D₃ preparation, lubricant, useful components that are sensitive to heat or moisture, etc. as needed, and tableted. The resulting tablets were then formed into tablets having a diameter of 12 mm to 20 mm, a thickness of 3 mm to 6 mm, and a weight of 500 mg to 3000 mg per tablet, using a rotary tableting machine. The tablet hardness as measured in the diameter direction using a Kiya hardness tester is preferably within the range of 5 kg to 15 kg, and most preferably within the range of 7 kg to 13 kg.

The prevention/treatment agent of the present invention is useful for preventing or treating alveolar bone resorption and periodontal membrane loss or for preventing or treating gingival recession, and the agent comprises a soy isoflavone aglycone, calcium, and vitamin D₃ as effective components. The form of the prevention/treatment agent of the invention is not limited as long as it is suitable for oral ingestion, and the prevention/treatment agent may be, for example, in forms that can be used for oral ingestion in foods, pharmaceuticals, etc.

The oral composition and the prevention/treatment agent of the present invention may contain additives typically used in foods, such as pH adjusters, organic acids, sugar alcohols, sweeteners, flavors, dental plaque formation inhibiting materials, and bad breath inhibiting materials; edible additives used in pharmaceuticals, such as excipients, other effective components, and carriers; etc. as needed, as long as the effects of the present invention are not impaired thereby. Examples of materials for such additives include phosphates, malic acid, citric acid, lactic acid, pantothenic acid, sugar alchols such as sorbitol, xylitol, erythritol, palatinit, palatinose, maltitol, and reducing starch sugars, isomerized sugars such as reducing isomaltooligosaccharides, gum bases, gum arabic, gelatin, cetyl methyl cellulose, sodium saccharin, aspartame, magnesium stearate, granulated sugar, powdered sugar, starch syrup, microcrystalline cellulose, 1-menthol, D-group vitamins other than vitamin D₃, K-group vitamins such as vitamin K, vitamin P, lysine, magnesium salts, calcitonin, ipriflavone, etc. The amounts of such additives are not limited and can be suitably determined in accordance with the purpose of use, etc.

The method for inhibiting alveolar bone resorption and periodontal membrane loss according to the present invention comprises orally administering at least one member selected from the group consisting of the above oral compositions and prevention/treatment agents. The method for preventing or treating gingival recession and the method for preventing or treating alveolar bone resorption and periodontal membrane loss according to the present invention comprise orally administering a soy isoflavone aglycone, calcium, and vitamin D₃.

In these methods, the subject for administration is not limited as long as it is a mammal; however, preferable subjects for administration are persons having decreased bone density, postmenopausal women, and periodontal disease patients in a maintenance phase. A person having decreased bone density is one whose bone mineral density is 1 SD (Standard Deviation) or more below the young adult mean (>−1 SD).

The administration amount, form, etc. of the oral composition and the prevention/treatment agent of the present invention are described above.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a sectional view of a tooth crown, dental root, and periodontal tissue, showing the relationship between CAL, PD, and gingival recession.

FIG. 2 is a graph showing the change of MMP-8 level with time in the gingival crevicular fluid (GCF) obtained in Test Example 1.

BEST MODE FOR CARRYING OUT THE INVENTION

The present invention is described below in more detail with reference to Examples and Test Examples. However, the present invention is not limited to these examples. In these examples, percentages are by weight unless otherwise indicated.

Test Example 1 Test for Bone Resorption Inhibition and Periodontal Membrane Loss Inhibition Using Periodontal Maintenance Patients

1. Test Subjects

The test subjects were 50 women periodontal disease patients at least one year after menopause. In selecting the test subjects, it was confirmed that they did not have any critical systemic underlying disease, were not under hormone replacement therapy or osteoporosis medicine treatment, and, within the past three months, had not undergone surgical periodontal treatment or antibiotic medication. The 50 test subjects were randomly assigned to two groups: a test group and a placebo group.

2. Test Pharmaceutical Preparation

Prescription of test pharmaceutical preparation: Non-calcinated shell calcium 650 mg (calcium content: 250 mg) Soy isoflavone extract 17 mg (containing 5 mg of soy isoflavone aglycon) (genistein: daidzein = 1.3:1) Vitamin D₃ 2.5 μ.g (100 IU) Sugar alcohol Balance Sweetener, Flavor, etc. 140 mg Total 2000 mg/tablet 3. Test Method

The subjects ingested two tablets of the test pharmaceutical preparation after breakfast for 24 weeks. At the time of tablet distribution (hereinafter referred to as baseline), and in the 12th and 24th weeks after the start of tablet ingestion, they were subjected to inquiries, standard X-ray photography of the oral cavity, periodontal tissue examination, and sampling of gingival crevicular fluid (hereinafter referred to as GCF) for biochemical marker measurement. The amounts of Ca and soy isoflavone daidzein and genistein that the subjects ingested from foods, etc. were calculated from meal records by registered dietitians.

4. Periodontal Tissue Examination

1) Periodontal Pocket Depth (hereinafter referred to as PD) and clinical attachment level (hereinafter referred to as CAL)

PD and CAL of all the teeth except the third molars were measured in units of 0.5 mm by the six-point method, using a 15 mm probe (UNC15, Hu Friedy, USA) with a scale graduated in 1 mm increments. CAL is the distance from the cement/enamel junction to the periodontal pocket bottom (see FIG. 1).

2) Gingival recession

Gingival recession was indicated by the numerical value obtained by subtracting the PD from the CAL at each point.

3) Alveolar bone height (hereinafter referred to as ACH)

Standard X-ray photography was performed on the molar sites on both sides by the bite wing method, and the distance from the cement/enamel junction to the alveolar bone crest along the dental root surface was measured by the same skilled person.

5. Measurement of biochemical marker in GCF

GCF was sampled from mesiobuccal sites of the third molars on the upper jaw right side and the lower jaw left side, using periopaper (Proflow™ Incorporated, USA). Periopaper was inserted to the bottom of a pocket, left for 10 seconds, taken out to measure the amount of GCF by a Periotron 8000 (Harco Electronics, USA). After periopaper was placed into a microtube, it was used to measure matrix metalloprotease-8 (hereinafter referred to as MMP-8), which is an index of connective tissue damage. After extraction processing with Tris chloride buffer solution (pH 7.6), MMP-8 was measured using MP-8 Human Biotrak ELISA System (Amersham Biosciences, USA). The whole amount of MMP-8 of each GCF sample was calculated from the measurement results.

6. Statistics analysis

The subjects' background factors, ACH, PD, CAL, and gingival recession were all analyzed by a one-way layout analysis of variance (ANOVA) and subsequent multiple comparison test. PD and CAL values were used for analysis, with the figure at the first decimal place being ignored. Change with time within group was analyzed by a Bonferroni-correction nonparametric test. For all analyses, a two-sided significance level of 5% was applied.

7. Results

1) General condition

No significant differences were recognized between groups in terms of background factors: age, BMI, menopause age, the number of years after menopause, the number of smokers, the number of teeth present, and the average amounts of ingestion of Ca, daidzein, and genistein from foods during the test period.

2) Periodontal tissue examination

No significant differences were recognized between the groups in terms of the subject average values of CAL, gingival recession, and ACH at the time of baseline.

2-1) CAL

Table 1 shows CAL average values and average rates of change (which are obtained by dividing the amount of change in the CAL average value at 12 or 24 weeks by the baseline CAL average value). In both groups, areas that had at least 3 mm CAL at the time of baseline, when they were under maintenance care after treatment, showed significant CAL decrease from the baseline at the 12th and 24th weeks. In order to adjust for the difference between the groups at the time of baseline, analysis was conducted on the CAL average rates of change obtained by dividing the amount of change in CAL at 12 or 24 weeks by the baseline CAL value. As the result, in comparison with the placebo group, the test group showed significant improvement in CAL at the 24th week. TABLE 1 CAL average value (mm) CAL rate of change (%) Group Baseline 12th week 24th week Δ12 weeks Δ24 weeks Test 3.90 3.42 3.34 −12.5 −14.2 group Placebo 4.08 3.75 3.74 −8.9 −8.9 group 2-2) Gingival recession

Table 2 shows gingival recession average values and rates of change (which are obtained by dividing the amount of change in the gingival recession average value at 12 or 24 weeks by the baseline gingival recession average value). In the test group and the placebo group, areas that had gingival recession at the beginning of the test showed significant improvement in gingival recession at the 12th and 24th weeks. However, the test group showed significant difference from the placebo group in the gingival recession rate of change at the end of the test. TABLE 2 Gingival recession Gingival recession average value (mm) rate of change (%) Group Baseline 12th week 24th week Δ12 weeks Δ24 weeks Test 1.70 1.19 1.08 −30.1 −37.8 Placebo 1.97 1.74 1.74 −15.0 −16.4 group 2-3) ACH

Table 3 shows ACH rates of change (which are obtained by dividing the amount of change in the ACH average value at 12 or 24 weeks by the baseline ACH average value). In order to adjust for the difference between the groups at the time of baseline, analysis was conducted on the ACH average rates of change obtained by dividing the amount of change in ACH at 12 or 24 weeks by the baseline ACH value. As the result, in comparison with the placebo group, the test group showed a tendency to inhibit ACH and, in particular, there was significant difference from the placebo group at the 12th week. TABLE 3 ACH rate of change (%) Group Δ12 weeks Δ24 weeks Test 0.3 0.3 group Placebo 7.1 9.5 group 2-4) Level of MMP-8 in GCF

FIG. 2 shows the MMP-8 average values at the time of baseline, the 12th week, and the 24th week. The placebo group did not show any changes, while the test group showed significant decreases from the baseline at the 12th and 24th weeks.

The above test results reveal the following points

The present test pharmaceutical preparation promoted improvement in the CAL of postmenopausal periodontal disease patients in a maintenance phase. It was thus found that the pharmaceutical preparation has the action of improving connective tissue attachment by the periodontal membrane, that is, the normal periodontal tissue attachment obtained by the periodontal membrane lying between the alveolar bone and dental root surface (cementum). Since the present test pharmaceutical preparation inhibited the level of MMP-8, it was found that the pharmaceutical preparation has the action of preventing loss of connective tissue mainly composed of periodontal membrane, thus being useful for inhibiting periodontal membrane loss.

Although alveolar bone resorption tends to make rapid progress in postmenopausal women, the present test group showed an inhibited increase in ACH in comparison with the placebo group. An effect of inhibiting alveolar bone resorption was thus found.

Although gingival recession tends to occur easily in treated areas, it was improved in the present test. It was thus found that not only a relapse of periodontal disease but also dental root surface caries and hypersensitivity due to exposed roots can be prevented and/or improved, and that aesthetic aspects can also be improved.

Example 1 Granule (Ingestion: 4 g per day)

Granules were produced by a standard method, using the following components: Component Amount (%) Whey calcium 50.00 (calcium content: 26%) Soy isoflavone extract 1.00 (aglycon content: 30%) (genistein: daidzein = 1.5:1) Oil-soluble licorice extract 1.00 Vitamin D₃ (vitamin D₃ content: 0.25%) 0.05 Xylitol 40.00 Palatinit Balance Aspartame 0.10 Gum arabic 1.00 Flavor 2.50 Total 100.00

Example 2 Intraoral Solution Tablet (Ingestion: 4 g per day)

Intraoral solution tablets were produced by a standard method, using the following components: Component Amount (%) Oyster shell calcium 35.00 (calcium content: 39%) Soy isoflavone extract 0.5 (aglycon content: 70%) (genistein: daidzein = 1.3:1) Palatinit Balance Maltitol 30.00 Vitamin D₃ (vitamin D₃ content: 0.25%) 0.05 Polydextrose 5.00 Sucrose fatty acid ester 4.00 Cocoa powder 5.00 Sucralose 1.00 Flavor 2.50 Total 100.00

Example 3 Intraoral Solution Tablet (Ingestion: 4 g per day)

Intraoral solution tablets were produced by a standard method, using the following components: Component Amount (%) Calcium tertiary phosphate 35.00 (calcium content: 39.1%) Soy isoflavone extract 1.50 (aglycon content: 33%) (genistein: daidzein = 1.3:1) Vitamin K 0.01 Vitamin D₃ preparation 0.1 (vitamin D₃ content: 0.25%) Xylitol 31.00 Palatinit Balance Citric acid 0.50 Gum Arabic 1.20 Magnesium stearate 1.00 Flavor 3.00 Total 100.00

Example 4 Chewing Gum (Ingestion: 20 g per day; 40% of Soy Isoflavone Eluted; 85% of Calcium Eluted; and 40% of Vitamin D₃ Eluted)

A chewing gum was produced by a standard method, using the following components: Component Amount (%) Calcium gluconate-calcium lactate amorphous 30.00 material (calcium content: 10%) Tea extract 0.05 Soy isoflavone extract 0.25 (aglycon content: 70%) (genistein: daidzein = 1.3:1) Gum base 27.00 Erythritol 10.00 Xylitol 38.00 Vitamin D₃ (vitamin D₃ content: 0.25%) 0.0001 Reducing malt sugar syrup Balance Flavor 5.00 Total 100.00

Example 5 Candy (Ingestion: 30 g per day)

A candy was produced by a standard method, using the following components.

Oyster shell calcium, xylitol, oil-soluble licorice extract, tea polyphenol extract, vitamin D₃, and powder flavor were incorporated in the center of the candy in powdered forms. Component Amount (%) Oyster shell calcium 5.00 (calcium content: 39%) Oil-soluble licorice extract 0.05 Soy isoflavone extract 0.1 (aglycon content: 70%) (genistein: daidzein = 1.3:1) Xylitol 5.00 Tea polyphenol extract 0.05 Palatint Balance Maltitol 10.00 Aspartame 0.04 Citric acid 0.50 Oil flavor 0.20 Powder flavor 0.30 Vitamin D₃ (vitamin D₃ content: 0.25%) 0.0001 Total 100.00

Example 6 Troche (Ingestion: 8 g per day)

A troche was produced by the standard method, using the following components: Component Amount (%) Citrate calcium 10.00 (calcium content: 21%) Calcium tertiary phosphate 15.00 (calcium content: 39%) Soy isoflavone extract 0.25 (aglycon content: 70%) (genistein: daidzein = 1:1) Vitamin D₃ (vitamin D₃ content: 0.25%) 0.05 Palatinit 33.00 Xylitol Balance Sodium carboxymethylcellulose 1.00 Citric acid 2.00 Malic acid 1.00 Aspartame 0.50 Sucrose fatty acid ester 4.00 Flavor 2.00 Total 100.00

Example 7 Drink Formulation (Ingestion: 100 ml per day)

A drink formulation was produced by a standard method, using the following components: Component Amount Fermentation lactic acid (50% aqueous solution) 0.97 g Gluconic acid (50% aqueous solution) 3.88 g Calcium gluconate-calcium lactate amorphous 5.00 g material (calcium content: 10%) Soy isoflavone aglycon-β cyclodextrin inclusion 0.350 g material (aglycon content: 3%) (genistein: daidzein = 1.5:1) Erythritol 7.00 g Sucralose 0.03 g Stevia 0.01 g Vitamin D₃ (vitamin D₃ content: 0.2%) 0.003 g Purified water Balance Total 100 ml 

1. An oral composition for alveolar bone resorption inhibition and periodontal membrane loss inhibition, comprising a soy isoflavone aglycone, calcium, and vitamin D₃.
 2. An agent for preventing or treating gingival recession, comprising a soy isoflavone aglycone, calcium, and vitamin D₃.
 3. An agent for preventing or treating alveolar bone resorption and periodontal membrane loss, comprising a soy isoflavone aglycone, calcium, and vitamin D₃.
 4. A composition or agent according to claim 1, wherein the proportion of soy isoflavone aglycone in the composition or agent is 0.001% to 10% by weight; and the proportion of calcium in the composition or agent is 0.01% to 50% by weight.
 5. A composition or agent according to claim 1, wherein the composition or agent is for persons having decreased bone density, postmenopausal women, or periodontal disease patients in a maintenance phase.
 6. A composition according to claim 1, wherein the soy isoflavone aglycone is an extract from whole-grain soy; the genistein/daidzein weight ratio in the soy isoflavone aglycone is in the range of 1/1 to 1.5/1; and the proportion of the total weight of genistein and daidzein in the soy isoflavone aglycone is at least 90%.
 7. A method for inhibiting alveolar bone resorption and periodontal membrane loss, comprising orally administering a composition according to claim
 1. 8. A method for preventing or treating gingival recession, comprising orally administering a soy isoflavone aglycone, calcium, and vitamin D₃.
 9. A method for preventing or treating alveolar bone resorption and periodontal membrane loss, comprising orally administering a soy isoflavone aglycone, calcium, and vitamin D₃.
 10. A method according to claim 8, wherein the soy isoflavone aglycone, calcium, and vitamin D₃ are administered to persons having decreased bone density, postmenopausal women, or periodontal disease patients in a maintenance phase.
 11. A method according to claim 9, wherein the soy isoflavone aglycone is administered in an amount of 10 mg to 40 mg per day; and calcium is administered in an amount of 500 mg to 2000 mg per day.
 12. A composition or agent according to claim 3, wherein the proportion of soy isoflavone aglycone in the composition or agent is 0.001% to 10% by weight; and the proportion of calcium in the composition or agent is 0.01% to 50% by weight.
 13. A composition or agent according to claim 3, wherein the composition or agent is for persons having decreased bone density, postmenopausal women, or periodontal disease patients in a maintenance phase.
 14. A method for inhibiting alveolar bone resorption and periodontal membrane loss, comprising orally administering a composition according to claim
 6. 15. A method according to claim 9, wherein the soy isoflavone aglycone, calcium, and vitamin D₃ are administered to persons having decreased bone density, postmenopausal women, or periodontal disease patients in a maintenance phase.
 16. A method according to claim 10, wherein the soy isoflavone aglycone is administered in an amount of 10 mg to 40 mg per day; and calcium is administered in an amount of 500 mg to 2000 mg per day. 